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[ARM] Move out mapping atom functionality to a separate class 

llvm-svn: 234874
This commit is contained in:
Denis Protivensky 2015-04-14 09:11:05 +00:00
parent e80fd18b45
commit 72a7581743
1 changed files with 36 additions and 46 deletions
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82
lld/lib/ReaderWriter/ELF/ARM/ARMRelocationPass.cpp
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@ -188,6 +188,36 @@ public:
DefinedAtom::CodeModel codeModel() const override { return Model; }
};
template <class BaseAtom, DefinedAtom::CodeModel Model>
class BaseMappingAtom : public BaseAtom {
public:
BaseMappingAtom(const File &f, StringRef secName, StringRef name)
: BaseAtom(f, secName) {
static_assert((Model == DefinedAtom::codeARM_a ||
Model == DefinedAtom::codeARM_d ||
Model == DefinedAtom::codeARM_t),
"Only mapping atom types are allowed");
#ifndef NDEBUG
_name = name;
#else
_name = getMappingAtomName(Model, name);
#endif
}
DefinedAtom::CodeModel codeModel() const override {
#ifndef NDEBUG
return isThumbCode(Model) ? DefinedAtom::codeARMThumb : DefinedAtom::codeNA;
#else
return Model;
#endif
}
StringRef name() const override { return _name; }
private:
std::string _name;
};
/// \brief Atoms that are used by ARM dynamic linking
class ARMGOTAtom : public GOTAtom {
public:
@ -246,71 +276,31 @@ private:
/// \brief PLT entry atom.
/// Serves as a mapping symbol in the release mode.
class ARMPLTAtom : public PLTAtom {
class ARMPLTAtom : public BaseMappingAtom<PLTAtom, DefinedAtom::codeARM_a> {
public:
ARMPLTAtom(const File &f, const std::string &name) : PLTAtom(f, ".plt") {
#ifndef NDEBUG
_name = name;
#else
// Don't move the code to any base classes since
// virtual codeModel method would return wrong value.
_name = getMappingAtomName(codeModel(), name);
#endif
}
DefinedAtom::CodeModel codeModel() const override {
#ifndef NDEBUG
return DefinedAtom::codeNA;
#else
return DefinedAtom::codeARM_a;
#endif
}
ARMPLTAtom(const File &f, const std::string &name)
: BaseMappingAtom(f, ".plt", name) {}
ArrayRef<uint8_t> rawContent() const override {
return llvm::makeArrayRef(ARMPltAtomContent);
}
Alignment alignment() const override { return 4; }
StringRef name() const override { return _name; }
private:
std::string _name;
};
/// \brief Veneer atom for PLT entry.
/// Serves as a mapping symbol in the release mode.
class ARMPLTVeneerAtom : public PLTAtom {
class ARMPLTVeneerAtom
: public BaseMappingAtom<PLTAtom, DefinedAtom::codeARM_t> {
public:
ARMPLTVeneerAtom(const File &f, const std::string &name)
: PLTAtom(f, ".plt") {
#ifndef NDEBUG
_name = name;
#else
// Don't move the code to any base classes since
// virtual codeModel method would return wrong value.
_name = getMappingAtomName(codeModel(), name);
#endif
}
DefinedAtom::CodeModel codeModel() const override {
#ifndef NDEBUG
return DefinedAtom::codeARMThumb;
#else
return DefinedAtom::codeARM_t;
#endif
}
: BaseMappingAtom(f, ".plt", name) {}
ArrayRef<uint8_t> rawContent() const override {
return llvm::makeArrayRef(ARMPltVeneerAtomContent);
}
Alignment alignment() const override { return 4; }
StringRef name() const override { return _name; }
private:
std::string _name;
};
class ELFPassFile : public SimpleFile {